Collar stay



FIG. 1 is a perspective view of a collar stay showing my present invention;

FIGS. 2 and 3 are respective front and rear elevation views of the collar stay;

FIGS. 4 and 5 are respective side elevational views of the collar stay;

FIG. 6 is a top plan view of the collar stay; and,

FIG. 7 is a bottom plan view of the collar stay. 

CLAIM The ornamental design for a collar stay, as shown and described. 